Cost of Windsor build Vs Cleve Build?
The C has smaller mains than the W, which reduces bearing speed. The C deck is also shorter (9.2 vs 9.3+). C rods are 5.78 vs 5.995 for the W. Good heads are going to cost - is it the same? Depends on what you have done. 4v's can be a bit cheaper than good aftermarket alum. heads, but the 4V's are not perfect. The build cost for the total motor will be about the same, but you will need to think more when building the C. Car Craft built a 500HP 408W for about $10,000 - there are plenty of folks on the 335 Forum that have that and didn't spend $10K. My .02$
1967 Falcon 4 door 351C - 70 Mustang 351C
Owner built, owner abused.